摘要:
A method for risk assessment violation monitoring during a functional safety process includes receiving parameters from a risk assessment of a portion of a system with physical devices. The parameters of the risk assessment are applicable to a safety device of a machine safety system. The safety device is configured to prevent a hazardous condition in the system. The method includes detecting a change of a condition of the safety device. The condition is indicative of a potential safety issue affecting operation of the machine safety system. The method includes comparing parameters related to the change of the condition of the safety device with the parameters from the risk assessment and sending an alert in response to determining that the change of the condition of the safety device results in a violation of the risk assessment.
摘要:
A method for reteaching a switching circuit is provided. The method includes presenting a target within a sensing range of a sensor of the switching circuit for a pre-determined duration and acquiring an identification code of the target via the sensor. The method also includes comparing the acquired identification code with all stored identification codes of other targets previously used by the switching circuit as a basis for switching and reteaching the switching circuit for switching based on the acquired identification code if the acquired identification code is different from all stored identification codes previously used by the switching circuit as a basis for switching.
摘要:
A system to test operation of an optical sensor (50) is disclosed. The optical sensor (50) includes one or more photosensitive devices (80) configured to convert light to electrical signals. A test light source (60) and a reference target (76) are included within the housing (52) of the optical sensor (50). The test light source (60) is mounted proximate to the photosensitive devices (80) and the reference target (76) is positioned opposite from the test light source (60). The test light source (60) is periodically pulsed on to emit light (62) at a known wavelength. The light (62) is reflected from the reference target (60) back to at least a portion (82) of the photosensitive devices (80). A logic circuit uses the reflected light (64) which is received at the portion (82) of the photosensitive devices (80) to determine the distance between the light source (60) and the reference target (76). This calculated distance is compared against the known distance to verify correct operation of the optical sensor (50).
摘要:
A system to test operation of an optical sensor (50) is disclosed. The optical sensor (50) includes one or more photosensitive devices (80) configured to convert light to electrical signals. A test light source (60) is included within the housing (52) of the optical sensor (50). The test light source (60) is periodically pulsed on to emit radiation (62) at a sufficient intensity to saturate each of the photosensitive devices (80). Each of the photosensitive devices (80) generates a signal corresponding to the intensity of light (62) detected at that device (80). A logic circuit uses the signals corresponding to the intensity of light to identify whether each of the photosensitive devices (80) is performing at an acceptable level.
摘要:
A system to test operation of an optical sensor (50) is disclosed. The optical sensor (50) includes one or more photosensitive devices (80) configured to convert light to electrical signals. A test light source (60) is included within the housing (52) of the optical sensor (50). The test light source (60) is periodically pulsed on to emit radiation (62) at a sufficient intensity to saturate each of the photosensitive devices (80). Each of the photosensitive devices (80) generates a signal corresponding to the intensity of light (62) detected at that device (80). A logic circuit uses the signals corresponding to the intensity of light to identify whether each of the photosensitive devices (80) is performing at an acceptable level.
摘要:
A system for improving a sensing ability of an interlock switch system may include an interlock switch and a target component. The interlock switch may include a first antenna coil that may receive one or more signals from one or more antenna coils within a sensing range of the first antenna coil. The target component may include an actuator that may interface with the interlock switch. The target component may also include at least two antenna coils. Each of the at least two antenna coils may then include an electronic identification (ID) associated with the target component.
摘要:
A system to test operation of an optical sensor (50) is disclosed. The optical sensor (50) includes one or more photosensitive devices (80) configured to convert light to electrical signals. A test light source (60) and a reference target (76) are included within the housing (52) of the optical sensor (50). The test light source (60) is mounted proximate to the photosensitive devices (80) and the reference target (76) is positioned opposite from the test light source (60). The test light source (60) is periodically pulsed on to emit light (62) at a known wavelength. The light (62) is reflected from the reference target (60) back to at least a portion (82) of the photosensitive devices (80). A logic circuit uses the reflected light (64) which is received at the portion (82) of the photosensitive devices (80) to determine the distance between the light source (60) and the reference target (76). This calculated distance is compared against the known distance to verify correct operation of the optical sensor (50).
摘要:
A method for reteaching a switching circuit is provided. The method includes presenting a target within a sensing range of a sensor of the switching circuit for a pre-determined duration and acquiring an identification code of the target via the sensor. The method also includes comparing the acquired identification code with all stored identification codes of other targets previously used by the switching circuit as a basis for switching and reteaching the switching circuit for switching based on the acquired identification code if the acquired identification code is different from all stored identification codes previously used by the switching circuit as a basis for switching.
摘要:
A method for predicting end-of-life for a component includes determining a baseline lifetime model for a component connected to a machine functional safety system. The component is part of a system with physical devices. The method includes monitoring environmental conditions and usage conditions of the component and modifying the baseline lifetime model based on the monitored environmental and usage conditions to produce a modified lifetime model for the component. The method includes tracking a lifetime progress of the component with respect to the modified lifetime model and sending an alert in response to lifetime progress of the component reaching a lifetime threshold associated with the modified lifetime model.